Uploading pdf

Rails
1

I am trying to upload the pdf using file io operations, i can select the
file but when i click on the upload button it is not uploading the file
here is my model

class DataFile < ActiveRecord::Base
def self.Save(upload)
name = upload[‘datafile’].original_filename
directory = “public/data”
# create the file path
path = File.join(directory, name)
# write the file
upload_file = File.new(upload[‘datafile’], ‘r’).read
File.open(path, ‘w’) {|f| f.write(upload_file) }

  image = Magick::ImageList.new('path.pdf')
  images = Dir['public/data/*.jpg']
  imglist = Magick::ImageList.new
  imglist.read(*images)
  imglist.write('name.pdf')
end

end

here is my controller

class UploadController < ApplicationController
def index
render :file => ‘app\views\upload\uploadfile.html.erb’
end
def uploadFile
DataFile.Save(params[:upload])
render :text => “File has been uploaded successfully”
end
end

here is my view

File Upload

<%= form_tag :url=>{:controller=>"upload",:action => 'uploadFile'},:html=>{:multipart => true, :remote => true} do |f|%>

Select File : <%= file_field 'upload', 'datafile' %>

<%= submit_tag('Upload')%> <% end%>